One month with Kotlin: singleton example

singletonExample.java

// Using Singleton on Kotlin
public object MySingleton {
  
  public fun foo() {
  }
  
}

// And use it on Kotlin
MySingleton.foo()

//------------------------------------------------------------------------------

// Using Singletons in Java 7
public class MySingleton {
  
  private static MySingleton instance;

  private MySingleton() {
  }
  
  public static MySingleton getInstance(){
    if(instance == null) {
      instance = new MySingleton();
    }
    return instance;
  }

  public void foo() {
  }

}

//Using use it in Java
MySingleton.getInstance().foo()